chaumont



Io which a projecting iiange extends around the lTo a/ZZ whom it mayconcern:

UNITED STATES JULES ,OHAUMONT, OF WOOD HAVEN i PATENT OFFICE. l

AssICNoR To TEIE LALANCE a. GROs- JEAN MANUFACTURING COMPANY, OE NEWYORK, N. Y.

WRCUGHT AND SHEET IRON vEsVsEL.

SPECIFICATION formingpart of LettersPatent No. 287,624, dated October30, 1883. f Application tiled July 13, 1883, (No modeLl Be it known thatI, YJULEs CHAUMONT, a citizen of the United States, residing at WoodHaven, in the county of Queens and State 0f New York, have inventedcertain new and useful Improvements in Wrought and Sheet Iron Vessels,of which the following is a specication. f

My invention more particularly relates to that class of sheet or wroughtiron vessels in edge of the bottomof the vessel and projects downwardtherefrom, so as to form a strong and durable foot or support for thevessel.

In the accompanying drawings, Figures 1 and 2 are sectional viewsofapparatus which I prefer to employ in the lconstruction of my improvedvessel. Fig. 3 is a vertical section of the lower portion of afvesselformed ac-l cording to my invention. I l

I prefer to construct the vessel as follows: Iiirst stamp or press byvmeans of dies a iiat blank of sheet-iron of the properpsize into theshape shown at A in Fig. l. The blank is thus given a form having a fiatbottom andY cylindrical sides. The blank isr next placed upon themandrelor die B, .which is of circular form, and has a recessed and preferablyslightly convex bottom, b. This bottom is surrounded vby the flangededge e. A die, D, having its upper .end shaped to fit within therecessed bottom of the mandrel B, is securely held directly beneath thelatter, when the mandrel B and the blank A are allowed to descend uponthe die D under sucient pressure to force the'bottom of the blank intothe shape of the respective upper and lower sur-v faces of the die D andmandrel B. The blank A is next removed from the mandrel B, and is placedupon another mandrel, C, the sides and` bottom of which should be formedto fit the corresponding parts of the interior of the blank. The mandrelC is adapted to be mounted upon the spindle of a lathe, and after beingplaced thereon, togetherV with the blank A, the'back center ofthe latheis brought to bear upon the chuck c, the bottom of the blank beingtightly clamped between mandrel Gand chuck c. Rotary motion is thenimparted to the mandrel C and chuck c, and by means of burnishers oranalogous tools employed in the process' of sheet-metal spinning -theouter and inner sides of the flange a of the blank-are compressed andforced closely together, thus making a strong foot or base for thevessel. By the proper and well-known manipulation of the burnisher thebead f (shown in Fig. 3) is formed upon the extreme edge of the flange,and made to project slightly outward from the flange a, thus greatlyincreasing the strength and durability of the completed article.

It is sometimes preferable to fo'rm the bead f by the aid of a wireinserted in the interior of the flange ,between its sides. The wireshould be insertedafter the blank has received the form given it bythe'operation exhibited in Fig. l. In Fig. 3 I have shown the` wirev inplace.v

I vclaim as my invention- 1. The teammate-described vessel, hw. ing theseamless supporting flange or foot, andy the annular bead upon the loweredge of said flange.

2. The hereinbefore-described vessel, hav# ing the seamless supportingflange or foot, and the annular bead with inclosed strengthening wireupon the lower edge of said flange.

In testimony whereof I'have hereunto subscribed my name this 12th day ofJuly, A. D. 1883.

Witness es J AMEs COCHRAN, CHARLES, SMITH.

.IULEs CHAUMONT.;

